I’m not 100% sure, actually. I don’t really no how that stuff works. I think my university has a deadline for when you can drop classes (which passed a while ago).
I think you need to meet with your advisor - the sooner the better. Tell your advisor what you want to do and ask how to get there. Many people have given great advice - business school, theatre, etc. Talk to people in the trade about how they got to where they are and what they wish they did differently. A college degree in general business, marketing, theatre arts, fashion, entrepreneurship will all help you run your business one day.
Talk to your advisor. If you can’t withdraw from the classes, how confident are you that you can pull those grades up if you put forth your best effort for the rest of the semester?
Have you looked at classes for beauty school? Very few of them offer make classes. It’s mostly hair. The best way to become a makeup artist is an apprenticeship.